SKUMIEL, A.; ŁABOWSKI, M. Effect of electric field on the ultrasonic wave propagation velocity in oils. Archives of Acoustics, [S. l.], v. 15, n. 3-4, p. 477–498, 1990. Disponível em: https://acoustics.ippt.gov.pl/index.php/aa/article/view/1302. Acesso em: 4 mar. 2026.